SUBFAMILY III. — STENOPODIN^E. 543 



d. Ocelli not or only slightly elevated; hind portion of head not 

 strongly narrowed into a slender neck; hind femora much sur- 

 passing apex of abdomen. IV. Stenopoda, p. 548. 

 dd. Ocelli located on a small protuberance or tubercle above the gen- 

 eral level of the head; hind portion of head strongly narrowed 

 into a neck; hind femora not at all or but slightly passing tip of 

 abdomen. 

 e. Joint 1 of beak slightly longer than joints 2 and 3 united; front 

 femora armed beneath. V. Schumannia, p. 549. 

 ee. Joint 1 of beak not longer than joint 2. 



/. Front femora thickened, armed beneath with very short spines; 

 joint 1 of beak much shorter than joint 2; hind femora not or 

 just reaching tip of abdomen. VI. Oncocephalus, p. 550. 



//. Front femora but little thickened, unarmed beneath; joints 1 and 

 2 of beak subequal in length ; hind femora slightly surpassing 

 abdomen. VII. Narvesus, p. 551. 



I. Pnirontis Stal, 1859b, 381. 



Elongate slender species having the antennae inserted above 

 the cheeks in the ends of the prominent antennif erous tubercles, 

 the tylus usually represented by a pair of short tapering spines 

 between the tubercles; joints 2 — 4 of antennae very slender, in 

 repose folded back and with the beak received in a groove 

 beneath the head ; hind lobe of head not constricted into a neck, 

 its disk with a longitudinal median groove ; ocelli small, not 

 elevated ; pronotum with transverse constriction feeble, the 

 sides converging from the base and ending in front in two 

 spines, the lower one the longer; front tibiae more or less 

 curved, shorter than femora and armed with several spines; 

 hind femora but little surpassing middle of abdomen. Male 

 with last dorsal of abdomen usually deeply cleft, the lobes more 

 or less divergent, their tips usually rounded. Other characters 

 as in key. About a dozen species are known, four of which 

 occur in our territory. 



KEY TO EASTERN SPECIES OF PXIROXTIS. 



a. Front tibiae armed on inner edge only with three or four spines. 

 b. Basal joint of antennae unarmed beneath; incisures of connexivals 

 without dark spots ; cheeks much surpassing antennif erous tuber- 

 cles. 516. LANGUIDA. 



bb. Basal joint of antennae armed beneath; apical angles of incisures 

 of connexivals both above and beneath with a small black spot; 

 cheeks but slightly surpassing antenniferous tubercles. 



517. INFIRMA. 



aa. Front tibiae armed on both inner and outer edges, the outer edge with 

 a stout spur and two shorter spines behind it. 



